Last week, I shot this region, and more, with my Samyang 135mm and ZWO ASI294MC Pro. I knew right away that I needed more power as that scale was too small. Enter the C11 with Hyperstar and ZWO ASI533 MC Pro a week later. The scope has 3x+ the focal length and the camera a smaller FOV but also smaller pixels. This is two hours of five minute subs using an Antlia Triband Ultra RGB light pollution filter.
WR-134 is a Wolf-Rayet star (very large and very hot) with a strong stellar wind that is pushing interstellar gas away from it while also energizing that gas so that it glows with green Oxygen III light.
From the River Ridge Observatory.
